Does any one have the instructions that go with this device?
I have some how lost the ones that I had and have come up with nothing searching the internet.

does this help any? http://rt-eng.com/rte/index.php/RTE_Tach_Faq

I ran up and down the links on the site, but unfortunately found nothing on the Calibrator.
It's a neat little tool that I believe is no longer made. I'm sure there is others out there that have one.

Only thing I could find that might help?... http://rt-eng.com/rte/images/c/ce/M5tachboard_manual.pdf

Did you try contacting them? They have an ebay store in that name. Might be able to ask them directly.

You can also send it in and let them install, and cal at the same time.

What's in my picture is the "Calibrator/Exerciser" that they use to manufacture and sell. You are thinking of the tach replacement board that they still sell.
The device I have is used to bench calibrate and exercise the needle bearing before reinstalling the tach.

See attachments

Thanks, That's the one.

Can you get some good pics of both sides of the circuit board? I'd like to see what is involved in making one.

Here is a couple of pics...

Thanks. Not very helpful, though. Surface mount components are hard to identify. I'll look around to see if I can find a schematic.